<template>
  <div>
    <!-- 面包屑导航区 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>

    <!-- 卡片视图区 -->
    <el-card>
      <!-- 提示区 -->
      <el-alert
        title="添加商品信息"
        type="info"
        center
        show-icon
        :closable="false"
      >
      </el-alert>
      <!-- 步骤条区 -->
      <el-steps
        :space="200"
        :active="activeIndex - 0"
        finish-status="success"
        align-center
      >
        <el-step title="基本信息"></el-step>
        <el-step title="商品参数"></el-step>
        <el-step title="商品属性"></el-step>
        <el-step title="商品图片"></el-step>
        <el-step title="商品内容"></el-step>
        <el-step title="完成"></el-step>
      </el-steps>

      <!-- tab栏区域 -->
      <el-form
        :model="addForm"
        :rules="addFormRules"
        ref="addFormRef"
        label-width="100px"
        label-position="top"
      >
        <el-tabs
          v-model="activeIndex"
          tab-position="left"
          :before-leave="beforeTabLeave"
          @tab-click="tabClicked"
        >
          <el-tab-pane label="基本信息" name="0">
            <el-form-item label="商品名称" prop="goods_name">
              <el-input v-model="addForm.goods_name"></el-input>
            </el-form-item>
            <el-form-item label="商品价格" prop="goods_price">
              <el-input v-model="addForm.goods_price" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品重量" prop="goods_weight">
              <el-input v-model="addForm.goods_weight" type="number"></el-input>
            </el-form-item>
            <el-form-item label="商品数量" prop="goods_number">
              <el-input v-model="addForm.goods_number" type="number"></el-input>
            </el-form-item>

            <el-form-item label="商品分类" prop="goods_cat" class="jilian">
              <el-cascader
                v-model="addForm.goods_cat"
                :options="catelist"
                :props="cateProps"
                expand-trigger="hover"
                @change="handleChange"
              ></el-cascader>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品参数" name="1">
            <!-- 渲染表单的Item项 -->
            <el-form-item
              :label="item.attr_name"
              v-for="item in manyTableData"
              :key="item.attr_id"
            >
              <!-- 复选框组 -->
              <el-checkbox-group v-model="item.attr_vals">
                <el-checkbox
                  :label="cb"
                  v-for="(cb, i) in item.attr_vals"
                  :key="i"
                  border
                ></el-checkbox>
              </el-checkbox-group>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品属性" name="2">
            <el-form-item
              :label="item.attr_name"
              v-for="item in onlyTableData"
              :key="item.attr_id"
            >
              <el-input v-model="item.attr_vals"></el-input>
            </el-form-item>
          </el-tab-pane>
          <el-tab-pane label="商品图片" name="3">
            <!-- action 表示图片要上传到的后台api地址 -->
            <el-upload
              :action="uploadURL"
              :on-preview="handlePreview"
              :on-remove="handleRemove"
              list-type="picture"
              :headers="headerObj"
              :on-success="handleSuccess"
            >
              <el-button size="small" type="primary">点击上传</el-button>
            </el-upload>
          </el-tab-pane>
          <el-tab-pane label="商品内容" name="4">
            <!-- 富文本编辑器组件 -->
            <quill-editor v-model="addForm.goods_introduce" />
            <!-- 添加商品的按钮 -->
            <el-button type="primary" class="btnAdd" @click="add"
              >添加商品</el-button
            >
          </el-tab-pane>
        </el-tabs>
      </el-form>
    </el-card>

    <!-- 图片预览 -->
    <el-dialog title="图片预览" :visible.sync="previewVisible" width="50%">
      <img :src="previewPath" class="previewImg" />
    </el-dialog>
  </div>
</template>
<script>
import _ from "lodash";

export default {
  data() {
    return {
      activeIndex: "0",
      // 添加商品的表单数据对象
      addForm: {
        goods_name: "",
        goods_price: 0,
        goods_weight: 0,
        goods_number: 0,
        // 商品所属的分类数组
        goods_cat: [],
        // 图片的数组
        pics: [],
        // 商品的详情描述
        goods_introduce: "",
        attrs: [],
      },
      // 表单校验规则
      addFormRules: {
        goods_name: [
          {
            required: true,
            message: "请输入商品名称",
            tigger: "blur",
          },
        ],
        goods_price: [
          {
            required: true,
            message: "请输入商品价格",
            tigger: "blur",
            // type: "number",
          },
        ],
        goods_weight: [
          {
            required: true,
            message: "请输入商品重量",
            tigger: "blur",
            // type: "number",
          },
        ],
        goods_number: [
          {
            required: true,
            message: "请输入商品数量",
            tigger: "blur",
            // type: "number",
          },
        ],
        goods_cat: [
          {
            required: true,
            message: "请选择商品分类",
            trigger: "blur",
          },
        ],
      },
      // 商品分类列表
      catelist: [],
      cateProps: {
        // expandTrigger: "hover",
        label: "cat_name",
        value: "cat_id",
        children: "children",
      },
      // 动态参数列表数据
      manyTableData: [],
      // 静态属性列表数据
      onlyTableData: [],
      // 上传图片的url地址
      uploadURL: "http://127.0.0.1:8888/api/private/v1/upload",
      // 图片上传组件的headers请求头对象
      headerObj: {
        Authorization: window.sessionStorage.getItem("token"),
      },
      // 图片完整路径
      previewPath: "",
      // 图片对话框默认隐藏
      previewVisible: false,
    };
  },
  created() {
    this.getCateList();
  },
  methods: {
    getCateList() {
      this.$http.get(`categories`).then((res) => {
        if (res.data.meta.status !== 200) {
          this.$message.error("获取商品分类数据失败！");
        } else {
          this.catelist = res.data.data;
          // console.log(res.data.data);
        }
      });
    },
    // 级联选择器选中项变化，会触发这个函数
    handleChange() {
      // console.log(this.addForm.goods_cat);
      if (this.addForm.goods_cat.length !== 3) {
        this.addForm.goods_cat = [];
      }
    },
    beforeTabLeave(activeName, oldActiveName) {
      // console.log('即将离开的标签页名字是：'+ oldActiveName);
      // console.log('即将进入的标签页名字是：'+ activeName);
      // return false
      if ((oldActiveName = "0" && this.addForm.goods_cat.length !== 3)) {
        this.$message.error("请选择商品分类！");
        return false;
      }
    },
    tabClicked() {
      // console.log(this.activeIndex);
      // 证明访问的是动态参数面板
      if (this.activeIndex === "1") {
        this.$http
          .get(`categories/${this.cateId}/attributes`, {
            params: {
              sel: "many",
            },
          })
          .then((res) => {
            if (res.data.meta.status !== 200) {
              return this.$message.error("获取动态参数列表失败！");
            } else {
              this.$message.success("获取动态参数列表成功！");
              // console.log(res.data.data);
              res.data.data.forEach((item) => {
                item.attr_vals =
                  item.attr_vals.length === "0"
                    ? []
                    : item.attr_vals.split(" ");
              });
              this.manyTableData = res.data.data;
              // console.log(this.manyTableData);
            }
          });
      } else if (this.activeIndex === "2") {
        this.$http
          .get(`categories/${this.cateId}/attributes`, {
            params: {
              sel: "only",
            },
          })
          .then((res) => {
            if (res.data.meta.status !== 200) {
              return this.$message.error("获取静态参数列表失败！");
            } else {
              this.onlyTableData = res.data.data;
              console.log(this.onlyTableData);
            }
          });
      }
    },
    // 处理图片预览效果
    handlePreview(file) {
      console.log(file);
      this.previewPath = file.response.data.url;
      this.previewVisible = true;
    },
    // 处理图片的操作
    handleRemove(file) {
      // console.log(file);
      // 1、获取将要删除的图片的临时路径
      const filePath = file.response.data.tmp_path;
      // 2、从pics数组中，找到这个图片对应的索引值
      const i = this.addForm.pics.findIndex((x) => {
        if (x.pic === filePath) {
          return;
        }
      });
      // 3、调用数组的splice方法，把图片信息对象，从pics数组中移除
      this.addForm.pics.splice(i, 1);
      // console.log(this.addForm);
    },
    // 舰艇图片上传成功的事件
    handleSuccess(res) {
      // console.log(res.data);
      // 1、先拼接得到一个图片信息对象
      const picInfo = {
        pic: res.data.tmp_path,
      };
      // 2、将图片信息对象，push到pics数组中
      this.addForm.pics.push(picInfo);
      // console.log(this.addForm);
    },
    // 添加商品
    add() {
      this.$refs.addFormRef.validate((valid) => {
        if (!valid) {
          return this.$message.error("请填写必要的表单项！");
        }
        // 执行添加的业务逻辑
        // lodash     cloneDeep(obj)
        const form = _.cloneDeep(this.addForm);
        form.goods_cat = form.goods_cat.join(",");
        // console.log(form);

        console.log(this.onlyTableData);
        // console.log(this.manyTableData);
        // 处理动态参数
        this.manyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals.join(" "),
          };
          this.addForm.attrs.push(newInfo);
        });
        // console.log(newInfo);
        // // 处理静态属性
        this.onlyTableData.forEach((item) => {
          const newInfo = {
            attr_id: item.attr_id,
            attr_value: item.attr_vals,
          };
          this.addForm.attrs.push(newInfo);
        });
        form.attrs = this.addForm.attrs;
        console.log(form);

        // 发起请求添加商品
        // 商品的名称必须是唯一的
        this.$http.post("goods", form).then((res) => {
          if (res.data.meta.status !== 201) {
            this.$message.error("添加商品失败！");
          } else {
            this.$message.success('添加商品成功！')
            this.$router.push('/goods')
          }
        });
      });
    },
  },
  computed: {
    cateId() {
      if (this.addForm.goods_cat.length === 3) {
        return this.addForm.goods_cat[2];
      } else {
        return null;
      }
    },
  },
};
</script>
<style lang="less" scoped>
.jilian {
  width: 250px;
}
.el-checkbox {
  margin: 0 10px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>